Signed-off-by: Michał Górny <mgo...@gentoo.org>
---
 eclass/dist-kernel-utils.eclass   | 16 ++++++++++++++++
 eclass/tests/dist-kernel-utils.sh | 28 ++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100755 eclass/tests/dist-kernel-utils.sh

diff --git a/eclass/dist-kernel-utils.eclass b/eclass/dist-kernel-utils.eclass
index 8c1b56f41506..439bdc87695d 100644
--- a/eclass/dist-kernel-utils.eclass
+++ b/eclass/dist-kernel-utils.eclass
@@ -155,5 +155,21 @@ dist-kernel_reinstall_initramfs() {
                "${kernel_dir}/System.map"
 }
 
+# @FUNCTION: dist-kernel_PV_to_KV
+# @USAGE: <pv>
+# @DESCRIPTION:
+# Convert a Gentoo-style ebuild version to kernel "x.y.z[-rcN]" version.
+dist-kernel_PV_to_KV() {
+       debug-print-function ${FUNCNAME} "${@}"
+
+       [[ ${#} -ne 1 ]] && die "${FUNCNAME}: invalid arguments"
+       local pv=${1}
+
+       local kv=${pv%%_*}
+       [[ -z $(ver_cut 3- "${kv}") ]] && kv+=".0"
+       [[ ${pv} == *_* ]] && kv+=-${pv#*_}
+       echo "${kv}"
+}
+
 _DIST_KERNEL_UTILS=1
 fi
diff --git a/eclass/tests/dist-kernel-utils.sh 
b/eclass/tests/dist-kernel-utils.sh
new file mode 100755
index 000000000000..82be706dc498
--- /dev/null
+++ b/eclass/tests/dist-kernel-utils.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+source tests-common.sh || exit
+
+inherit dist-kernel-utils
+# TODO: hack because tests-common don't implement ver_cut
+EAPI=6 inherit eapi7-ver
+
+test_KV_to_PV() {
+       local kv=${1}
+       local exp_PV=${2}
+
+       tbegin "dist-kernel_PV_to_KV ${kv} -> ${exp_PV}"
+       local val=$(dist-kernel_PV_to_KV "${kv}")
+       [[ ${val} == ${exp_PV} ]]
+       tend $?
+}
+
+test_KV_to_PV 6.0_rc1 6.0.0-rc1
+test_KV_to_PV 6.0 6.0.0
+test_KV_to_PV 6.0.1_rc1 6.0.1-rc1
+test_KV_to_PV 6.0.1 6.0.1
+
+texit
-- 
2.38.0


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